Threading device



FIG. 1 is a top, front, left side perspective view of a threading device showing my new design;

FIG. 2 is a top, rear, right side perspective view thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a left side elevation thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a top plan view thereof. 

The ornamental design for a threading device, as shown. 